不同时段补光对日光温室冬春茬黄瓜幼苗质量的影响

日光温室冬春茬黄瓜栽培,在幼苗子叶展平期至两叶一心期分别进行不同时段的补光处理,试验期间日光温室保温被开启时间8:40~16:00。结果表明:与未补光的对照相比,T(6:40~9:40)、T(13:00~16:00)和T(15:00~18:00)补光处理均显著增加了茎粗、壮苗指数、叶面积及第1片真叶叶绿素、类胡萝卜素、可溶性糖、淀粉含量、幼苗的地下部干质量、地上部干质量、全株干质量。综合来看,以上3个时段的补光效果显著优于T(8:40~11:40)和对照,更有利于培育壮苗,且这3个时段的补光效果基本一致。

Effects of Supplementary Light at Different Time on Quality of Cucumber Seedlings in Solar Greenhouse

This study was conducted in solar greenhouse where cucumber was cultivated in winter-springseason．During cotyledon flattened period to the second leaf starting flattened，cucumber seedlings was treatedwith supplementary light at different time．During experiment period heat preservation quilt was uncovered from8：40-16：00 in solar greenhouse．The results showed that compared with the contrast without supplementarylight，supplementary light treatment at T（6：40-9：40），T（13：00-16：00） and T（15：00-18：00）could significantly increase seedling stem diameter，healthy seedling index，leaf area，contents of chlorophyll，carotene，soluble sugar，starch，etc．and seedling dry weights of underground，over ground parts and wholeplant．To sum up，the effects of supplementary light by the above 3 treatments are obviously superior than that ofT（8：40-11：40） and the contrast．These 3 treatments are in favor of cultivating healthy seedlings．The effectsof these 3 treatments are basically the same．